Improvement in thill-couplings



T. TUFTS. Thill-Goupling.

No. 219,129. Patented S ept. 2, 1879;.

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l la H. PETERS, FNOTO-LITHOGRAPHER, WASNINGYON. D, c.

To all whom it may concern:

Be it known that I, Tnvro'rnv TUFTS, of

, represented in the accompanying drawings, of whichj and with respect to its screws clamp-plate, in manner as hereinafter exand its joint-pin enlarged or provided with a I riage-axle, or part thereof; and B, the shaft atwith. Such joint-pin is provided with a sepa- TIMOTHY TUFTS, OF SOMERVILLE, MASSACHUSETTS.

IM'PROVEMENT IN THlLL-COUPLlN-GS.

I Specification forming part of Letters Patent No. 219,129,

dated September 2, 1879; application filed February I7, 1879.

Somerville, of the county of Middlesex and: State of Massachusetts,have invented a new and useful Improvement in Carriage-Shaft Attachments; and do hereby declare the same to be-olescribed in the following specification and Figure 1 is a top view, Fig. 2 a side elevation, Fig. 3 a longitudinal section, and Fig. 4 a transverse section, of a shaft, shackle, or attachment provided with my invention.

In carrying out 1nyimprovement,l arrange the axle and the bearings of the ball-and-joint pinof the furcated arm within a single bow, and nuts and plained, whereby the bowand its clamp-plate, and its screws and nuts, not only answer to connect the joint parts with the axle, but to tighten the hearings on the ball, as occasion or wear may require. Furthermore, I combine a cross-bar and a bow or clasp provided with screws and nuts with the shaft furcated arm ball, as explained, and with the joint-pin box or bearings having a bearing-socket for the pin and one for the enlargement or ball, all being essentially as shown and described.

In the drawings, A denotes a wheel cartachment, composed of a furcated arm, a, a joint-pin, I a box or bearings, c d, and a supporting bow or clasp, c, with its screws ff, crossbar g, and nuts h h, all being formed, applied, and arranged as represented.

The joint-pin b extends from one to the other of the prongs of the arm a, and is or should be fixed therein so as to turn thererate spherical enlargement or ball, k, to enter a correspondingly-shaped cavity, 1, made in the two bearings or parts 0 dot the box, and across and opening into the cylindrical pin passage or bearingthereof.

The globe or ball It heretofore has been made in two separate pieces, the pin, after the ball is in place in the socket of the bearings, being driven through them and into the prongs of the forked arm. I A

I make the ball with a prismatic hole, m, going diametrically through it, and I construct that part, a, of the pin which is within the ball correspondingly prismatic. I also make prismatic the parts 0 o of the pin, which tit to the prongs of the arm a, the intermediate parts, p p, of the pin being cylindrical. (See Fig. 6, which is an end view of the ball, and Figs. 7 and 8, the first of which is a side view and the second an end view, of the pin.)

To insure the ball being kept in place on the joint-pin, a rivet or pin may be inserted laterally in or through them.

It will be seen that were the ball and pin in one piece, in order to get the pin into the prongs of the fork, they would have to be spread apart sufficiently to admit it into their holes, and afterward be closed or bent toward each other on the pin.

The duplex-pronged bow B and its two screws f f and nuts it h, with the crossbar g, by the arrangement of both axle and bearings within the bow, as shown, serve to confine them together and to the forked arm and its ball and pin.

Fig. 5 is a top view of the furcated arm,

with its joint-pin and the ball or spherical enlargement of the pin. This ball or enlargement and its socket operate to prevent wear of the shaft joint-pin and lateral play of the arm a relatively to the box, and the usual rattling or noise consequent thereto. Furthermore, by means of the devices for connecting the box with the axle, the bearings c 01 may be tightened on the joint-pin enlargement, as may be necessary, or as occasion from time-to time may require.

It is not new to provide a shaft-coupling with a ball or enlargement and pin or journals in one piece, as will be found by reference to the United States Patents Nos. 14,931

and 123,597, my invention being an improvement on such a coupling.

What I claim in the described improved shaft-couplin g is- The axle A, arranged in the bow B between the bearings c d and the clamp-plate g, and against the rear bearing, d, in combination with the furcated arm, and the joint-pin and ball, arranged with such bearings and bow as set forth.

TIMOTHY TUFTS. Witnesses: a

B. H. EDDY, W. W. LUNT.. 

